Perplexed

[PaulS]

I did usde it for a couple of hours today till it got too hot and still no power steering. So far as I know I have no way to check the pressure. The hydro drives the tractor excellent and I was presuming the same hydro unit also pressures the lift and steering. Correct me if I am wrong.

[Oak]

Paul, there is an implement relief valve that could be causing your problem. If all the hydraulics are slow on the tractor but it drives fine maybe that is whats wrong. I not 100% sure as I never had to tear into one yet but maybe some of the other guru's will chime in.

[EricR]

Originally Posted by Oak

Paul, there is an implement relief valve that could be causing your problem. If all the hydraulics are slow on the tractor but it drives fine maybe that is whats wrong. I not 100% sure as I never had to tear into one yet but maybe some of the other guru's will chime in.

Todd right there is the problem but I'm not sure how to fix it either!

[J-Mech]

You need to do a pressure check. You should be able to borrow/rent a gauge set for testing pressure for automatic transmissions at a parts store. Otherwise, go to a hardware store, and buy a 1000 PSI gauge. Then pull the plug for the relief valve and take it and the gauge to a place that makes hydraulic hoses. Have a hose made that will screw into the port, and the other end to accept a gauge. Let us know what you find. If you haven't done it, I'd really do looking the lines over to see if any are either twisted at a fitting, or kinked. Look everywhere. PS handpump, valve stack, and the pump. I really think that it is a flow, not a pressure problem, but I'm not there to see it, so I'm just going by description.

[PaulS]

This tractor does have a 3 point rear lift. I checked and yes it is quite slow. I weigh about 170 - 175 lbs and raised the arms part way and with me standing on it it went down but would not go up. Could that be a pressure problem. This tractor seems to be the same as my 2084 as far as the hydro goes except for possibly the way a rear lift hooks up on the 2084.

[J-Mech]

It's definitely a pressure problem. If the 3pt won't pick you up, yes.

Question first: You said you were using it today till it got too hot. What got hot? Outside temp (too hot for you?)? Or the hydro?

No, the 2084 is plumbing is different than the 2072...... kinda. They use different spool valves, but if you understand hydraulics, they are the same. So, you can't compare them by "looks".

You need to know what pressure the system is running at. But, even then, you may not know if it is a relief valve problem, or a charge pump issue. I suspect at this point there is a charge pump problem. However, a simple pull-and-clean of the relief valve is probably where I'd start.

It is letter "C" in the pic. There is an o-ring on the cap I'd replace, other than that, pull it and make sure there is nothing stuck in it. You need to find a way to "flush" or clean out the hole too. The oil may drain out of it, (I can't remember if it will or not). Just make sure there is nothing in the hole. (Dirt, or debris.) Make sure that the poppet (#20) is not grooved, or marred. If it is, it's bad. If not, then you have a pump problem.

1811 pump 2.gif


Come back and let us know what you find. If you need to look into the pump, I can help with that too. Sent you a PM too.

[PaulS]

When I reread my post I realized I did not define "it got too hot" It was not the tractor it was the weather. In central PA we do not get many 90 degree days and yesterday was one of them. A further description of this tractor may be in order. In addition to what I have already said this tractor has the front hydro ports. everything is 2072 except the engine and drive shaft which we had to have made due to length difference. Most likely this tractor will not be used for mowing purposes although it came with a 60 inch haban deck and a 451 snow blower. At the moment it has a Johnny Bucket Jr mounted to the front this has no affect on the hydro as they are electrically operated. As mentioned before we have had the tractor split a couple of times for leaks and initial cleaning. The fluid that was in it was quite bad. We drained and cleaned the tranny initially and even drilled the drain holes in the axle tubes that Sam Mac suggests because both were filled with fluid and water when we took them apart. We at that time did not replace the filter but refilled the tranny with new fluid and ran it for over a month and then again drained the fluid, replaced the filter with a cub cadet hydro filter and filled it with fluid. As I said the tractor drives excellent. Absolutely no slow down going up hill or speed up going down hill. I will look for the relief valve mentioned just to see if I can find it. This tractor has been ridden hard and not even put away wet but suspect left outside wet but we are close to having what we want with this beast. Jumping into the hydro side of this tractor has been a little intimidating as neither Eric or I know much about hydros and their operation.

[Oak]

Sounds good Paul. I have not torn into the relief valves on one yet either so were gonna need lots of pictures. I have a busted super pump on one of my tractors. If I get a chance tonight I will pull it and take some pics for you guys and if you need it I can send it to ya.

[PaulS]

What is busted about it. We may be interested.

[PaulS]

Sorry guys but since I posted about our problem I have notices a whole bunch more posts about hydro problems. Sure hope I did not wake up a sleeping beast with my post.